Systems and methods for positioning in frequency range 2
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- ZTE CORP
- Filing Date
- 2023-07-31
- Publication Date
- 2026-05-20
Smart Images

Figure 1.1
Abstract
Description
SYSTEMS AND METHODS FOR POSITIONING IN FREQUENCY RANGE 2TECHNICAL FIELD
[0001] The disclosure relates generally to wireless communications, including but not limited to systems and methods for positioning in frequency range 2 (FR2) .BACKGROUND
[0002] The standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC) . The 5G NR will have three main components: a 5G Access Network (5G-AN) , a 5G Core Network (5GC) , and a User Equipment (UE) . In order to facilitate the enablement of different data services and requirements, the elements of the 5GC, also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need.SUMMARY
[0003] The example embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.
[0004] At least one aspect is directed to a system, method, apparatus, or a computer-readable medium of the following. A first wireless communication entity (e.g., a user equipment (UE) ) may configure (e.g., channel (CH) / reference signal (RS) resource) a second message to be sent or received based on a relation associated with a first message sent or received by the first wireless communication entity. The relation may comprise: an uplink (UL) spatial relation, a downlink (DL) Quasi-Co-Location (QCL) relation, a sidelink (SL) spatial / QCL relation, and a pathloss relation.
[0005] In some embodiments, the relation can be configured per one or more resource sets of the second message, or per one or more resource groups of the second message. In some embodiments, the relation can be indicated by a single bit. The single bit can be indicated per reference Signal or per path of a resource for the reference Signal. In certain embodiments, the relation can be indicated by n bits, n being an integer greater than 1. The n bits may correspond to a path index, a path delay, one or more path angles, one or more path delays, one or more RSRPPs, one or more timestamp (s) , or an Angle of Arrival (AOA) index.
[0006] In some embodiment, the first wireless communication entity may send a third message to the second wireless communication entity. The third message may comprise at least one of: AOAs of different paths, path IDs of different paths, path delays of different paths, or arrival times of different paths. The first wireless communication entity may measure Path-Specific. The first wireless communication entity may send the measurement of Path-Specific to a second wireless communication entity or a core network entity (e.g., a location management function (LMF) ) .
[0007] In some embodiments, path-Specific can be measured by a second wireless communication entity. The measurement of Path-Specific can be configured to be reported to a core network entity (e.g., a location management function (LMF) ) , or configured for the first wireless communication entity. Assistance data concluding the Path-Specific can be configured by the core network entity.
[0008] In some embodiments, the first wireless communication entity may send a third message requesting the assistance data to the core network entity. A second wireless communication entity may request the assistance data. The relation can be associated with one or more valid time gaps. The relation may further comprise a pathloss relation, and the reference resource of pathloss relation. The relation can be associated with one or more ranges. Each of the one or more ranges may include at least one of: expectedRSTD, expectedRSTD-uncertainty, expectedAoD, expectedAoA, or ExpectedAoD-or-AoA. Each of the one or more ranges can be configured per resource, per one or more resource sets, per one or more resource groups, or per one or more Transmission Reception Points (TRPs) .
[0009] In some embodiments, the second message can be a SL-PRS. The first message can be a Physical Sidelink Shared Channel (PSSCH) . The relation may comprise a sidelink (SL) spatial / quasi co location (QCL) relation of a reference resource. The reference resource can be indicated by at least one of: a pool index, a slot index, a sub-channel, a resource block (RB) set, an interlace index, a comb index, a port index, an antenna panel index, or a path indicator.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for purposes of illustration only and merely depict example embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered limiting of the breadth, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.
[0011] FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure;
[0012] FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure;
[0013] FIG. 3 illustrates a sequence diagram for positioning, in accordance with some embodiments of the present disclosure;
[0014] FIG. 4 illustrates a sequence diagram for positioning, in accordance with some embodiments of the present disclosure;
[0015] FIG. 5 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0016] FIG. 6 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0017] FIG. 7 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0018] FIG. 8 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0019] FIG. 9 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0020] FIG. 10 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0021] FIG. 11 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0022] FIG. 12 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0023] FIG. 13 illustrates an example of positioning, in accordance with some embodiments of the present disclosure;
[0024] FIG. 14 illustrates an example of positioning, in accordance with some embodiments of the present disclosure; and
[0025] FIG. 15 illustrates a flow diagram of an example method for positioning, in accordance with an embodiment of the present disclosure.DETAILED DESCRIPTION
[0026] 1. Mobile Communication Technology and Environment
[0027] FIG. 1 illustrates an example wireless communication network, and / or system, 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network, and is herein referred to as “network 100. ” Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101. In FIG. 1, the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126. Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.
[0028] For example, the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively. Each radio frame 118 / 124 may be further divided into sub-frames 120 / 127 which may include data symbols 122 / 128. In the present disclosure, the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communications, in accordance with various embodiments of the present solution.
[0029] FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) in accordance with some embodiments of the present solution. The system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein. In one illustrative embodiment, system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of FIG. 1, as described above.
[0030] System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) . The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.
[0031] As would be understood by persons of ordinary skill in the art, system 200 may further include any number of modules other than the modules shown in FIG. 2. Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software can depend upon the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.
[0032] In accordance with some embodiments, the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each comprising circuitry that is coupled to the antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion. Similarly, in accordance with some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210 that includes a RF transmitter and a RF receiver each comprising circuity that is coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion. The operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.
[0033] The UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212 / 232 that can support a particular wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
[0034] In accordance with various embodiments, the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, a femto station, or a pico station, for example. In some embodiments, the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc. The processor modules 214 and 236 may be implemented, or realized, with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. In this manner, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. A processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.
[0035] Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof. The memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.
[0036] The network communication module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communication with the base station 202. For example, network communication module 218 may be configured to support internet or WiMAX traffic. In a typical deployment, without limitation, network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional Ethernet based computer network. In this manner, the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) . The terms “configured for, ” “configured to” and conjugations thereof, as used herein with respect to a specified operation or function, refer to a device, component, circuit, structure, machine, signal, etc., that is physically constructed, programmed, formatted and / or arranged to perform the specified operation or function.
[0037] The Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems. The model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it. The OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols. The OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model. In some embodiments, a first layer may be a physical layer. In some embodiments, a second layer may be a Medium Access Control (MAC) layer. In some embodiments, a third layer may be a Radio Link Control (RLC) layer. In some embodiments, a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer. In some embodiments, a fifth layer may be a Radio Resource Control (RRC) layer. In some embodiments, a sixth layer may be a Non Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.
[0038] Various example embodiments of the present solution are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present solution. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the example embodiments and applications described and illustrated herein. Additionally, the specific order or hierarchy of steps in the methods disclosed herein are merely example approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present solution. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present solution is not limited to the specific order or hierarchy presented unless expressly stated otherwise.
[0039] 2. Systems and Methods for Positioning in Frequency Range 2 (FR2)
[0040] Positioning technology is rapidly advancing. FR2 is a prominent topic for positioning. Under this background, the beam management with FR2 in the 5th Generation mobile communication system (5G-NR) can be leveraged for positioning. Considering the restrictions on delay and overhead for positioning, reducing the delay and overhead of the positioning reference signal (PRS) or other signal transmission in FR2 can be a significant challenge. Therefore, the present disclosure aims to propose several schemes that improve delay restriction, overhead restriction, and address other related problems for positioning in FR2.
[0041] To minimize the delay and overhead of reference signal (RS) transmission in 5G-NR, spatial relations for uplink (UL) and quasi-co-location (QCL) relations for downlink (DL) are employed. Configuring a reference resource with spatial relation for target sounding reference signal (SRS) transmission may reduce the need for multiple beam sweeping iterations, thus significantly reducing transmission delay and overhead. However, the path granularity of spatial / QCL relation or other configurations has not yet been considered.
[0042] Moreover, for DL, a user equipment (UE) may report its measurements / estimates to a location management function (LMF) . In some embodiments, the LMF may respond by sending assistance data to the UE for improved positioning. The UE may have the capability to request the LMF to provide assistance data, and vice versa, the LMF can request the UE to report its measurements / estimates.
[0043] FIG. 3 shows a LTE positioning protocol (LPP) assistance data transfer procedure. The target can be a user equipment (UE) . The server can be a location management function (LMF) . FIG. 4 shows a measurements / estimates (e.g., location information) transfer procedure.
[0044] For an uplink (UL) , a transmission and reception point (TRP) may report its measurements / estimates to a LMF. The LMF may send assistance data to the TRP. The assistance data can be used to assist the TRP positioning. The TRP can request the LMF to send the assistance data. The LMF can request the TRP to report the measurement / estimate.
[0045] In this disclosure, a higher layer can be at least one of: a radio resource control (RRC) layer, a sidelink positioning protocol (SLPP) , a PC5-RRC, a PC5-S, a medium access control (MAC) layer or application layer. A physical layer can be at least one of: 1-st sidelink control information (SCI) , 2-ed SCI, SCI for SL-PRS, or MAC CE.
[0046] In this disclosure, beam, beam info or beam direction may have the same concept, which includes at least one of the following: a QCL state, transmission configuration indication transmission configuration indicator (TCI) state, spatial relationship information, reference signal information, spatial filter information, or precoding information. Beam / beam direction can be a resource. For example, a transmitter spatial filter, a receiver spatial filter, a transmitter precoding, a receiver precoding, an antenna port, an antenna weight vector, or an antenna weight matrix can all be used as beams.
[0047] The parameters of QCL may include at least one of the following: a Doppler shift, a Doppler spread, an average delay, a delay spread, an average gain, or spatial parameters (e.g., spatial Rx parameter) . The beam can be a transmission or reception method, including at least one of the following methods: space division multiplexing or frequency domain / time domain diversity. The transmitted beam or transmission method can be indicated by a reference signal resource index or a spatial relationship index.
[0048] The beam or transmission or reception method of a transmission can be determined based on the reference signal resource index, which means that the transmission or reception filter parameters of the transmission are the same as the transmission or reception filter parameters of the reference signal resource indicated by the reference signal resource index.
[0049] The spatial relationship can be indicated by reference signals. The spatial relationship index can also be a reference signal index. The transmitted beam or transmission or reception method can be determined based on the reference signal resource index, which means that the demodulated reference signal of the transmission and the reference signal indicated by the reference signal resource index may have the same QCL parameters.
[0050] Spatial parameters may include spatial reception parameters, such as angle of arrival, spatial correlation of received beams, average delay, and correlation of time-frequency channel responses (including phase information) . The spatial relationship for a certain reference channel (CH) / reference signal (RS) resource. Such as SL-PRS in dedicated resource pool, may rely on the resource pool ID, slot ID, CSI-RS ID, the PSSCH / SL-PRS resource and the pool ID or other combines of these ID or resource (s) .
[0051] The target RS1 and / or CH1 resource / resource group (s) (set (s) ) can be configured with the spatial / QCL relation of the RS2 and / CH2 reference resource / reference resource group (s) (set (s) ) . The RS1 / CH1 transmission may have spatial / QCL relation with RS2 / CH2. The RS group1 / CH group1 transmission may have spatial / QCL relation with RS2 / CH2. The RS1 / CH1 transmission may have spatial / QCL relation with RS group2 / CH group2. The RS group1 / CH group1 transmission may have spatial / QCL relation with RS group2 / CH group2. The RS1 / CH1 and / or RS2 / CH2 may be from UL, DL, SL or the signal set between BSs. The RS1 / CH1 and / or RS2 / CH2 may be from at least one of the following: PSFCH, PSSCH, PSCCH, S-SSB, Physical Downlink Shared Channel (PDSCH) , Physical Downlink Control Channel (PDCCH) , PRS, SL-PRS, Channel State Information Reference Signal (CSI-RS) , Channel State Information Interference Measurement Signal (CSI-IM) , Demodulation Reference Signal (DMRS) , Downlink Demodulation Reference Signal (DL DMRS) , PSCCH DMRS, PSSCH DMRS, Sidelink CSI-RS, Uplink Demodulation Reference Signal (UL DMRS) , Sounding Reference Signal (SRS) , Phase-Tracking Reference Signals (PTRS) , Random Access Channel (RACH) , Synchronization Signal (SS) , Synchronization Signal Block (SSB) , S-SSB, Primary Synchronization Signal (PSS) , Secondary Synchronization Signal (SSS) , SL-PSS, SL-SSS, or PSBCH DMRS.
[0052] Alternatively, the RS1 and / or RS2 can be at least one of: SSB, CSI-RS, DL-PRS, DMRS or other signal. The CH1 and / or CH2 can be at least one of: PBCH, PDCCH, PDSCH, PUCCH, PUSCH, PSCCH, PSSCH, PSBCH, or PSFCH.
[0053] The beam (s) / beam configuration (s) can be transmitted from the LMF to the BS, and / or the BS to the UE, and / or the UE to the BS, and / or the BS to the BS, and / or the UE to the LMF, and / or the UE to the UE. The beam information can be contained in a higher layer (e.g., at least one of RRC layer, SL LPP, PC5-RRC, PC5-S, MAC layer or application layer) or a physical layer (e.g., 1-st SCI, 2-ed SCI, SCI for SL-PRS or MAC CE) .
[0054] A reference (signal) resource can be received or sent. The special relation can be configured between RS1 / CH1 and RS2 / CH2. For uplink, when the UE sends the target resource RS1 / CH1, RS2 / CH2 can be configured as the reference resource of special relation. The RS2 / CH2 can be the received and / or transmitted RS / CH. Alternatively, for downlink, when the UE receives the RS1 / CH1 resource, the RS2 / CH2 reference resource can be configured as the QCL / special relation. The RS2 / CH2 can be received and / or transmitted RS / CH resource. Alternatively, for sidelink, when the UE sends / receives the RS1 / CH1 resource, the RS2 / CH2 reference resource can be configured as the QCL / special relation. The RS2 / CH2 can be received and / or transmitted RS / CH resource. For an uplink example, the SRS transmission may have spatial relation with a DL-PRS reference resource. For a downlink example, the DL-PRS resource receiving may have QCL relation with a DL-PRS reference resource. For a sidelink example, the SL-PRS transmission / receiving may have spatial / QCL relation with a CSI-RS reference resource.
[0055] The various relations described in this disclosure can be one or more of beam relation, including QCL relation, spatial relation, and / or pathloss relation. In the following examples, one or more of relations are taken as examples, which can all be extended to one or more of the above relations.
[0056] In addition, in the following examples, a certain positioning method can be taken as an example, and related solutions proposed can be applied to other positioning methods. In addition, in the following examples, a certain transmission method can be taken as an example, and the related solutions proposed can all be applied to the transmission method. For example, the schemes proposed in UL can be extended to DL, SL or wireless communication between a BS and a BS.
[0057] Example 1
[0058] Using the uplink AOA positioning method as an example, it can be also applied for other positioning methods. For uplink, the gNB / TRP may configure the spatial relation for SRS, SRS-Pos. Configuration of the spatial relation between a reference RS and the target SRS. Reference RS can be SSB / CSI-RS / SRS / DL-PRS. For example, the SRS transmission may have spatial relation with DL-PRS. For the uplink AOA positioning method, the UE may send one or more SRS / SRS-Pos to TRP (s) and / or UE (s) . For frequency range 2 (FR2) , a SRS transmission can be based a certain beam direction.
[0059] The transmission UE can be based on the spatial relation of other reference signal / resource to send the SRS / SRS-Pos. However, the reference resource may not be the best beam or useful beam. For example, the UE may receive the reference resource with a line of sight (LOS) path, and the LOS path may not be in the center of the beam but a sidelobe beam. If the UE uses another beam nearby / align with the sidelobe beam to send SRS, the TRP may have a better reception. It is workable for using one beam to receive the path-specific information, or using multiple beams to receive the path-specific info. For example, the UE may use widen beam (s) to receive, and use narrow beam (s) to transmit. The path-specific information may map the narrow beams. So a reference resource in the beam info configuration cannot configure the transmission beam well. The path-specific information can further indicate one or more beams.
[0060] From the perspective of beam coverage, a wide receiving beam may correspond to multiple narrow transmitting beams. Before a user equipment (UE) sends a Sounding Reference Signal (SRS) , the beam relationship configured by the Base Station (BS) or Transmission / Reception Point (TRP) can be based on a previous beam sweeping performed by the UE to determine the transmitting beam. The narrow transmitting beam resulting from this beam sweeping may only align with the strongest path direction, while other paths may not be well utilized. Additionally, as time passes and the UE moves, the strongest path can become blocked or obscured. In such cases, path-specific information such as Received Signal Received Power (RSRPP) can be used to assist the UE in performing another beam sweeping. During this beam sweeping, the configuration can be limited to several narrow beam ranges corresponding to the wide beam or the previously second-strongest transmitting beam based on RSRPP. Furthermore, it is also possible to assign different path-specific information corresponding to different beams of the same reference resource for different target SRS resources. The details are as follows.
[0061] As following, there can be several schemes about how to use the path-specific information to assistant the beam selection.
[0062] 1: 1 (SRS: PRS) may mean / indicate that one Sounding Reference Signal (SRS) is selected from multiple Reference Signal Received Power Patterns (RSRPPs) of one Physical Reference Signal (PRS) to determine the beam or spatial domain filter.
[0063] The first method, the UE may use a RS (e.g., SSB, CSI-RS, SRS, SRS-Pos, DL-PRS, DMRS or other) resource as the reference resource of spatial relation configuration for the target SRS / SRS-Pos.
[0064] The UE may send the SRS-Pos based on a spatial relation of the DL-PRS resource. The DL-PRS resource may correspond many beam directions. The SRS-Pos can be transmitted with one of the beam directions.
[0065] Case 1: Add one bit in the spatial relation indication (e.g., selection from more spatial filter) . The bit may use to indicate if the SRS-Pos resource transmission based on different beams / direction or the different RSRPPs of the same DL-PRS. There can be no different beam direction or different RSRPPs for a DL-PRS used as the spatial relation. The one bit PerPathEnable can indicate that the spatial relation indication is per referenceSignal or per path of the referenceSignal resource. Such as if the PerPathEnable bit is 1, the UE may transmit the SRS-Pos based on (one or more) RSRPP. If the bit is 0, the UE may transmit the SRS-Pos based on a scheme.
[0066] Case 2: Add n bit in the spatial relation indication (e.g., indicate which spatial filter is selected) . The n bit can be the path index, path (relative or absolute) delay, AOA (index) or other index. The n bit can be used to explicit or implicit indicate one or more directions of the path received from the DL-PRS. That means that the UE receives a DL-PRS, the UE can get different RSRPPs, multiple AOA, timestamps and other path specific information. These path specific information can indicate which path / resource / beam / direction (s) is / are used for the SRS-Pos as spatial relation explicit and / or implicit. The path / resource / beam / direction which is used as spatial relation can be one or more.
[0067] Explicit indication: The TRP may configure the spatial relation of SRS-Pos with the DL-PRS, giving some explicit indication including which (receiving) path / resource / beam / direction of the DL-PRS is / are the spatial relation of the target SRS-Pos (e.g., the beam index of different path, the index of RSRPP or other direction index) . The index / value of RSRPP, AOA, timestamp or other path specific information can be indicated. RSRPP -Angle of Arrival (AOA) can be measured by the Transmission / Reception Point (TRP) using the AOA corresponding to the Received Signal Strength Indicator (RSRP) .
[0068] Implicit indication: The UE may report the RSRPP measurement results in an order. When the TRP configures the spatial relation of a SRS with the DL-PRS with a certain RSRPP, the TRP can use the RSRPP value or the RSRPP order index and the DL-PRS resource to indicate the spatial relation for the SRS-Pos, which is similarly as the index / value of AOA, timestamp or other path specific information.
[0069] The IE (s) can be per referenceSignal, and / or per SRS-SpatialRelationInfo. The location (s) of the new IE (s) can be P1 and / or P2:
[0070] The IE (s) can be per referenceSignal, and / or per servingRS, and / or per SRS-SpatialRelationInfoPos. The location (s) of the new IE (s) can be P1 and / or P2 and / or P3:
[0071] Case 3: UE implementation. The TRP may configure the spatial relation of the target SRS with a DL-PRS resource. The DL-PRS resource can be received by different beam directions (e.g., the RSRPP) , which beam (s) can be used for the target SRS transmission that is based on the UE implementation.
[0072] For example, the SRS-Pos may have the spatial relation with one direction of the DL-PRS. The direction can be same as the max RSRPP receive direction. For example, the SRS-Pos group may need two spatial relation with one direction of DL-PRS. The spatial relation direction can be the max two RSRPPs receive directions. For another example, when the difference between the path and the center of the received beam is significant, neighboring beams can be selected.
[0073] Example 2
[0074] The spatial relations can be configured per resource set (s) / group (s) (e.g., the spatial relations of SRS resource group / set) . The DL-PRS can be transmitted with a Tx beam from a TRP. Then the UE received the DL-PRS with beam 1, and measured RSRPPs of DL-PRS. The SRS resources in the SRS resource group / set can be configured with the reference resource DL-PRS and / or some indicators of path-specific information.
[0075] m: 1 (m SRS: PRS) may mean / indicate that m Sounding Reference Signals (SRS) are selected from multiple Reference Signal Received Power Patterns (RSRPPs) of one Physical Reference Signal (PRS) to determine m beams.
[0076] The UE may use a DL-PRS as the spatial relation for a target SRS resource group. The DL-PRS may correspond to some paths. The SRS (s) in SRS group may have relation with the DL-PRS resource. Each SRS in the SRS group may have the same schemes with Example 1.
[0077] The target SRS resource group can be the SRS resource set. The SRS resources in a SRS resource group may have some similarly functions or features.
[0078] For example, the UE can sent the SRS group with two SRSs, and a DL-PRS can be configured as the spatial relation. The DL-PRS corresponds to n path, one SRS in the SRS group is configured / transmitted with the path 2 as the spatial relation, and another SRS in the SRS group is configured / transmitted with the path n. Such as a wall is nearby the UE, and it can reflect the signal, path n can be as a spatial reference path and the configured / transmitted spatial relation for the SRS.
[0079] Problem 1. The current method is that TRP / gNB configures the spatial relation is per SRS resource. If some SRSs in a SRS resource set / group has same spatial relations, configuration per SRS resource may cause excessive signaling overhead.
[0080] Enhancement Method 1: Introduce the configuration per SRS resource set / group. For example, the SRS set is configured with spatial relation of a DL-PRS. Each SRS in the SRS set may have the same schemes with Example 1. The different SRS in a SRS resource group, the transmissions can use the same or different beam direction (s) / path (s) . The new IE Path-Specific list can be used to indicate the spatial relations for the SRS resource group.
[0081] Enhancement Method 2: The (SRS / TCI) resource group can be the candidate transmission RS and / or CH during a time window. This can ensure the spatial relations are effective, which are useful for a moving system.
[0082] Example 3
[0083] 1: n (SRS: n PRS) may mean / indicate that one Sounding Reference Signal (SRS) is selected from multiple Reference Signal Received Power Patterns (RSRPPs) of n Physical Reference Signals (PRS) to determine the spatial domain filter. The UE may use a DL-PRS resource group which contains n DL-PRS as the spatial relations for a target SRS / SRS-Pos resource set / group.
[0084] The UE may use n DL-PRS as the spatial relation for a target SRS resource group. The DL-PRSs correspond to some paths. The SRS (s) in SRS group may have relation with the DL-PRS resource group. Each SRS in the SRS group may have the same schemes with Example 1.
[0085] The target SRS resource group can be the SRS resource set. The SRS resources in a SRS resource group may have some similarly functions or features. The DL-PRS resource group can be the DL-PRS resource set. The DL-PRS resources in a DL-PRS resource group may have some similarly functions or features. For example, the UE can sent the target SRS, and a DL-PRS resource group is configured as the spatial relation. Each DL-PRS may correspond to n path. The target SRS can be configured / transmitted with the path 2 of DL-PRS1 as the spatial relation. The gNB / TRP may configure more DL-PRS spatial relation, and the target SRS can be transmitted based on the one path beam direction.
[0086] Example 4
[0087] m: n (m SRS: n PRS) may mean / indicate that m Sounding Reference Signals (SRS) are selected from multiple Reference Signal Received Power Patterns (RSRPPs) of n Physical Reference Signals (PRS) to determine m spatial domain filters.
[0088] The UE may use a DL-PRS resource group which contains n DL-PRSs as the spatial relation for a target SRS / SRS-Pos resource set / group. The UE may use n DL-PRSs as the spatial relation for a target SRS. The DL-PRSs correspond to some paths. The SRS group may have relation with the DL-PRS resource group. Each SRS in the SRS group may have the same schemes with Example 1.
[0089] For example, the UE can sent the SRS group with two SRSs, and a DL-PRS resource group can be configured as the spatial relation. Each DL-PRS may correspond to n path. The SRS in the SRS group can be configured / transmitted with the spatial relation path 2 and path n of DL-PRS 1. Another SRS can be configured / transmitted with the spatial relation path 2 of DL-PRS 2. The path number can be different from the DL-PRS number, such as n1 DL-PRS resources in a resource group and n2 path for a DL-PRS resource. A special relation can maintain a time window. The window can be configured per special relation, per UE, per resource or per resource group.
[0090] Example 5
[0091] The direction / RSRPP (s) is / are measured by the UE, and reported to the TRP / gNB / LMF. Then LMF may send the assistance data to the TRP / gNB. The TRP / gNB may configure the spatial relation of SRS-Pos based on the assistance.
[0092] Problem 1. The current method is that the UE measures the RSRPP only for DL-PRS.
[0093] Enhancement Method 1: For UL-AOA, the SSB, CSI-RS, DMRS or other RS / CH can be also the resource for spatial relation. The RSRPP measurement can be support for SSB, CSI-RS, DMRS or other RS / CH. One bit indicator can be introduced to indicate the measurement is RSRP, RSRPP, or UE capability.
[0094] Problem 2. The current method is that the UE measures the DL-PRS RSRPP, and reports to the LMF. For DL-AOD method, the LMF can obtain the UE location angles based on the RSRPP reported by UE and the DL-PRS sent beam / direction of TRP.
[0095] Enhancement Method 2: For UL-AOA, the target SRS-Pos can be transmitted based on the spatial relation of DL-PRS RSRPP. For the TRP / gNB, the DL-PRS RSRPP can be obtain from the LMF or the UE. The (DL-PRS) RSRPP measurement results can be reported to the TRP / gNB / LMF / UE from the UE / LMF.
[0096] Measurement:
[0097] Path-Specific can be measured by the UE, and can be reported to the LMF and / or the TRP / BS / gNB.
[0098] Path-Specific can be measured by the TRP, and can be reported to the LMF and / or configured for the UE.
[0099] Assistance data:
[0100] The LMF may configure the TRP the assistance data concluding the Path-Specific IE.
[0101] The LMF may configure the UE the assistance data concluding the Path-Specific IE.
[0102] Request:
[0103] The TRP / UE may send an IE to request the LMF to send the assistance data concluding the Path-Specific IE.
[0104] The gNb / TRP may send an IE to request LMF the assistance data (path specific information, such as the DL-PRS RSRPP in the examples) .
[0105] Some enhancement schemes:
[0106] The UE can report the path delay or the difference arrive time of different paths to the TRP / LMF. The UE can report the AOA of different paths to the TRP / LMF (e.g., RSRPP, thinner beam, branch) . The UE can report the path ID of different paths to the TRP / LMF.
[0107] For measurement enhancement of UE: multiple AOA can be measured for a receive resource. For measurement enhancement of TRP: the (relative) path delay can be measured by the TRP. The measurement can be reported to the LMF. Based on the Enhancement schemes, the beam management may be more efficient.
[0108] Example 6
[0109] For the DL-PRS resource, the QCL information can be configured per DL-PRS resource. SSB or DL-PRS can be the reference resource. When RSRPPs are measured, for a received resource, there can be more than one path / angle / beam can be used as the QCL reference resource / indicator information. So new IE Path-Specific can be introduced in the QCL information to indicate which path / angle / beams is / are the QCL relations (for the same resource) . Other schemes in other detailed example, such as UL special relation, can also apply to DL.
[0110] More than one path / angle / beam can be used as a reference QCL resource / beam indicator. How to decide a path / angle / beam as the receive path / angle / beam is important. The QCL information cannot give a detailed direction. So the Path-Specific IE and / or expected information can be used for the UE to decide the range / which of the receive path / angle / beam. Alternatively, the expected information can be used for UE to decide the range / which of the receive path / angle / beam (e.g., the expectedRSTD, expectedRSTD-uncertainty, expectedAoD, expectedAoA, ExpectedAoD-or-AoA to determine the spatial domain filter) . Alternatively, the IE TCI-State associates one or two DL reference signals with a corresponding quasi-colocation (QCL) type. The IE Path-Specific can be used to indicate the path relation for IE TCI-State and / or TCI-UL-State.
[0111] Path-Specific list may comprise one or more Path-Specific IE (s) . Path-Specific IE can be path angle (s) , path delay (s) , RSRPP (s) , and / or timestamp (s) .
[0112] The measurements per path can be reported associated. The measurement can be the absolute RSSI, RSRPP, multiple AOA, delay, or relative RSSI, RSRPP, multiple AOA, delay (RelativeTimeDifference) . Such as the order or the index of the measurements reported may have the one-to-one correspondence relation.
[0113] For example, the RSRPP 1, RSRPP 2, …, RSRPP n can be mapping with AOA1, AOA 2, …AOA n. Alternatively, RelativeTimeDifference 1, RelativeTimeDifference 2, …, RelativeTimeDifference n can be mapping with AOA1, AOA 2, …AOA n.
[0114] The Path-Specific IE can be the explicit indication. Alternatively, the Path-Specific IE can be the implicit indication.
[0115] Example 7
[0116] For UL positioning methods, a SRS transmission can be based on the spatial relation. For a DL-PRS reference resource, there can be more than one path / angle / beam can be used for target SRS resource transmission. If the detail path / beam direction is or not configured by the TRP / LMF, the expected information can be used as a reference or filtering for the spatial relation. That is to say, the special relation / beam of SRS may have relation with the expected information.
[0117] The expected information can be at least one of expectedRSTD, expectedRSTD-uncertainty, expectedAoD, expectedAoA, ExpectedAoD-or-AoA, which is a spatial range for SRS transmission. By the spatial range, the UE can decide the transmission beam direction. The NLOS path can be useful for positioning or receiving signals.
[0118] The new spatial range IE is introduced per SRS resource / per TRP / per UE.
[0119] Case 1: The SRS transmission beam direction may have relation with assistance data.
[0120] For example, the granularity of spatial range can be same as the DL-PRS-ExpectedLOS-NLOS-Assistance, “per-trp” , or “per-resource” . The assistance data spatial range can base on the ExpectedLOS-NLOS.
[0121] Such as only for LOS case, there can be an Expected spatial range assistance. The Expected spatial range IE may configure the expected spatial range to send the target SRS. The target resource can be configured with the DL-PRS as the spatial relation, and the different path within the Expected spatial range can be the transmission beam direction.
[0122] Such as only for LOS case, there can be a non-Expected spatial range assistance. The non-Expected spatial range IE may configure the unexpected spatial range to send the target SRS. The target resource can be configured with the DL-PRS as the spatial relation, and the different path without the non-Expected spatial range can be the transmission beam direction.
[0123] Such as only for NLOS case, there can be an Expected spatial range assistance. The Expected spatial range IE may configure the expected spatial range to send the target SRS. The target resource can be configured with the DL-PRS as the spatial relation, and the different path within the Expected spatial range can be the transmission beam direction.
[0124] Such as only for NLOS case, there can be a non-Expected spatial range assistance. The non-Expected spatial range IE may configure the unexpected spatial range to send the target SRS. The target resource can be configured with the DL-PRS as the spatial relation, and the different path without the non-Expected spatial range can be the transmission beam direction.
[0125] Such as for LOS and NLOS case, there can be an Expected spatial range assistance. The Expected spatial range IE may configure the expected spatial range to send the target SRS. The target resource can be configured with the DL-PRS as the spatial relation, and the different path within the Expected spatial range can be the transmission beam direction.
[0126] Such as for LOS and NLOS case, there can be a non-Expected spatial range assistance. The non-Expected spatial range IE may configure the unexpected spatial range to send the target SRS. The target resource can be configured with the DL-PRS as the spatial relation, and the different path without the non-Expected spatial range can be the transmission beam direction.
[0127] Expected spatial range is used to configure the preferred beam area range. And non-Expected spatial range is used to configure the non-preferred beam area range.
[0128] Case 2: The SRS transmission beam direction may have relation with measurement data. For example, the granularity of Expected spatial range can be same as the LOS-NLOS-Indicator. Such as the DL-PRS is measured with the LOS indicator, the UE can use the legacy scheme to send SRS. If the DL-PRS is measured with the NLOS indicator, the UE can use the enhancement scheme to send SRS. Such as the m max RSRPP path (s) can be as the spatial relation of the target SRS sending. The spatial relation with these RSRPP path can reduced the beam sweeping delay. It can also work on the virtual anchor (s) or virtual target schemes.
[0129] The new spatial range IE is introduced per SRS resource / resource set / resource group. The spatial range is configure per SRS resource set / group. All the SRS in the SRS resource group / set have the same spatial range. The target SRS resource / resource set / resource group are associated with the spatial range, and the target resource is / are related with the reference resource (s) . Thus the spatial range IE corresponds the DL-PRS resource.
[0130] The new spatial range list IE is introduced per SRS resource / resource set / resource group. The spatial range list is configure per SRS resource set / group. The spatial range list contains at least one spatial range. The target SRS resource / resource set / resource group are associated with the spatial range list, and the target resource is / are related with the reference resource (s) . Thus the spatial range list corresponds at least one of the DL-PRS resource group / set. All the SRS in the SRS resource group / set have the same spatial range. For a target SRS resource, a spatial range list can be configured. The spatial range list includes one or more spatial range, which assists to send the target SRS. Alternatively, for a target SRS resource set, a spatial range list can be configured. The spatial range list includes one or more spatial range, which assists to send the target SRSs in the SRS resource set.
[0131] Example 8
[0132] Originally, Pathloss was per resource, with granularity similar to spatial / QCL relation. Now, it can be enhanced to be per path. All the schemes and corresponding signaling introduced for spatial / QCL relation can be extended to include new signaling and applied to Pathloss as well. For example, a 1-bit indication can be used to determine whether to use per path Pathloss. All the schemes described in this disclosure can be equally applicable to theIntegrated Sensing And Communication (ISAC) system.
[0133] This information element Pathloss Reference Information may indicate a pathloss reference for transmission of UL SRS by a UE (e.g., multiple candidate pathloss reference RS path (s) for SRS power control) .
[0134] SRS resource can be mapping a pathloss reference RS (e.g., multiple candidate pathloss reference RS path (s) for SRS power control) . SRS resource can be mapping Multiple pathloss reference RS (s) or a pathloss reference RS group / set (e.g., multiple candidate pathloss reference RS path (s) for SRS power control) . SRS resource group / set can be mapping a pathloss reference RS (e.g., multiple candidate pathloss reference RS path (s) for SRS power control) . SRS resource group / set can be mapping Multiple pathloss reference RS (s) or a pathloss reference RS group / set (e.g., multiple candidate pathloss reference RS path (s) for SRS power control) .
[0135] The scheme 1, pathlossReferenceRS-Pos is per ResourceSet. Scheme 2, a new IE pathlossReferenceRS is per resource. This is due to the different resource in a resource set may be sent by different beams. So a different pathloss can be obtained. For a resource, there are more than one RSRPP / Path-Specific (list) can be as a reference / indicator.
[0136] Example 9
[0137] There can be a beam / QCL / spatial relation between SCI and SL-PRS. For Dedicated resource pool, shared resource pool, SCI (indicating SL-PRS) may have a beam / QCL / spatial relation with SL-PRS.
[0138] Case 1: Each SL-PRS can be indicated by one SCI. SL-PRS may have a beam relation with the SCI that indicates the SL-PRS.
[0139] Case 2: One SCI can indicate multiple SL-PRSs. SL-PRSs may have a beam relation with the SCI that indicates these SL-PRSs. Alternatively, there can be a beam relation between multiple SL-PRSs.
[0140] FIG. 9 shows the QCL relations for SL-PRS and SCI transmission. The initial beam / spatial / QCL relation for a certain resource or resource set configured by MAC CE / PC-5 RRC / LPP / SLPP. The QCL source of the control signal SCI may be the reference resource (s) that has been sent / received by PC5-RRC / MAC CE / RRC / LPP / SLPP.
[0141] Introduce a 1-bit information in SCI: Indicate whether need a new beam sweeping. If the previous beam relation / information can be reused, there is no need to do the beam sweeping. If the previous beam relation / information cannot be reused, there is need to do the beam sweeping.
[0142] Introduce a new bits in SCI to request / report new beam / QCL / spatial relation (s) . Considering unicast, the additional bits can be placed in the 2nd SCI or the 1st SCI or the SCI indicating SL-PRS. RS2 / CH2 can be a signal received before sending RS1 / CH1 or a signal / channel sent before sending RS1 / CH1.
[0143] Signaling process: use SCI, MAC CE, RRC, PC5-RRC, LPP, SLPP, PC5-RRC, and / or RRC and / or LPP and / or SLPP to configure / modify / request / notify spatial / QCL / beam / pathloss relations. Pre-configure certain fixed default QCL relation messages, which can be dynamically modified based on:
[0144] A. Higher-layer signaling PC5-RRC or RRC modifications.
[0145] B. Introduction of new physical layer signaling or existing relevant signaling, such as boresight, to flexibly change the QCL relation.
[0146] In some embodiments, QCL / Spatial relation can be configured by the UE (which can be a cooperative UE) / LMF / BS / TRP and involved in forwarding. The UE / LMF / BS / TRP may determine / assist in determining the configuration of QCL / Spatial relation.
[0147] For example, in unicast communication between UE1 and UE2, UE1 sends SL-PRS, and the spatial / QCL relation of the target SL-PRS is configured by the PC-5 RRC signaling, which indicates a certain received / sent CSI-RS resource as a reference resource. Furthermore, the configuration can indicate the path-specific relevant signaling used for this reference resource.
[0148] The physical layer SCI (1st SCI and / or 2nd SCI / SCI indicating SL-PRS) may contain spatial / QCL-related configuration information. This spatial / QCL-related configuration can be targeted at the resource that the UE receiving this SCI plans to send. For example, a UE received a SCI with beam configuration. The UE sends a target SL-PRS based on the beam configuration.
[0149] Example 10
[0150] Case 1: The transmission of SL-PRS may have a beam relation (QCL / spatial relation) with S-SSB resources. The S-SSB can be based on S-SSB forwarded by the UE.
[0151] Case 2: The SL-PRS may have a beam relation (QCL) with SSB resources. This relation involves the base station, and the UE obtains SL-PRS beam information based on TRP's SSB, at least Type D.
[0152] FIG. 10 shows the beam relation between SL-PRS and S-SSB. In the case of FR2, suppose the S-SSB is a synchronous reference signal forwarded from UEA to UEB. When UEA sends SL-PRS to UEB, it can use the same beam as the one used for sending the S-SSB. The UEA transmits this configuration information to UEB before sending SL-PRS. In FIG. 10, if the UE sends multiple SL-PRS cyclically or repetitively, then these SL-PRS can maintain the beam / QCL / spatial relation with the most recently sent / received (temporally) or previously sent / received S-SSB.
[0153] Case 3: The SL-PRS may have a beam / QCL / spatial relation with other SL-PRS. For example, if the UE sends multiple SL-PRS cyclically or repetitively, then the sent / received SL-PRS can maintain the QCL / spatial relation with the most recently sent / received (temporally) or previously sent / received SL-PRS. The SL-PRS may have a beam / spatial / QCL relation with PSCCH / PSSCH / PSFCH.
[0154] Case 4: The SL-PRS may have a beam / spatial / QCL relation with SCI.
[0155] Case 5: SCI (indicating PSSCH) may have a beam / spatial / QCL relation with SL-PRS. The examples of SL-PRS with PSSCH are similar to those shown in FIGs. 11 and 12. Replace PSSCH with PSCCH (SCI indicating PSSCH) to apply.
[0156] Case 6: SL-PRS may have a beam / spatial / QCL relation with PSFCH. Similar to the examples of SL-PRS with PSSCH, as shown in FIGs. 11 and 12. Replace PSSCH with PSCCH (SCI indicating PSSCH) to apply.
[0157] Case 7: SL-PRS transmission may have spatial relation / QCL with PSSCH, where the PSSCH contains information associated with positioning or SL-PRS (e.g., carrying high-level information such as Anchor position) . Alternatively, PSSCH transmission has spatial relation / QCL with SL-PRS, where the PSSCH contains information associated with positioning or SL-PRS (e.g., carrying high-level information such as Anchor position) .
[0158] FIG. 11 shows the shared resource pool SL-PRS and PSSCH transmission QCL. For a shared resource pool, the SL-PRS transmission and PSCCH transmission can be in the same resource pool. The QCL / spatial relation can be configured per resource and / or per UE.
[0159] The reference resource can be indicated by the pool index and / or the slot index and / or the sub-channel and / or the RB set and / or the interlace index and / or the comb index and / or the port index and / or the antenna panel index or other indicators associated with the reference resource. Additionally, the path indicator can be needed for the spatial / QCL relation configuration.
[0160] For example, the target SL-PRS in the dedicated resource pool can be configured with the spatial / QCL relation of a reference resource in another resource pool. The resource pool ID can be needed to indicate the reference resource. Additionally, the sub-channel and / or the slot and / or the comb index can be also needed for the reference resource.
[0161] When configuring the beam / pathloss relation (s) , the target resource and / or the reference resource can be signals / channels from the same resource pool or different resource pools. The different resource pools can be different SL data resource pools, or SL data resource pool and SL-PRS dedicated resource pool, or SL shared resource pool and SL-PRS dedicated resource pool, or unlicensed band pool for SL positioning and licensed resource pool. All these resource pool can include the target resource and / or the reference resource. For instance, the target resource comes from a licensed resource, while the reference resource comes from an unlicensed band.
[0162] Alternatively, it can be signals / channels from a dedicated resource pool and SL resource pool with a beam relation. The benefit of this is that when UE1 sends SL-PRS to UE2, the used beam is not limited to the resource pool where the sending resource is located. This reduces the sending delay of SL-PRS and the resource overhead of beam sweeping. When indicating the beam / pathloss relation, additional information, such as pool ID, can be included in the indication to ensure the correct reference resource indication.
[0163] FIG. 12 shows the FDM dedicated resource pool SL-PRS and PSSCH transmission QCL. Taking FDM's dedicated pool as an example, the same applies to other forms of dedicated pool resources, such as TDM or TDM&FDM. For example, the target SL-PRS in the dedicated resource pool can be configured with the spatial / QCL relation of a reference resource that comes from an unlicensed band. The RB set and / or interlace index and / or the slot and / or the comb index can be needed to indicate the reference resource. Additionally, if the resource pool is different from the target RS / CH resource, the resource pool ID or other ID associated with the resource pool can be needed to indicate the reference resource.
[0164] Case 8: SCI has a beam / QCL / spatial relation with S-SSB / PSCCH / PSSCH / PSFCH. PSCCH may have a beam / QCL / spatial relation with PSSCH. PSSCH (PSCCH) may have a beam / QCL / spatial relation with S-SSB. PSSCH (PSCCH) may have a beam / QCL / spatial relation with PSFCH. PSSCH may have a beam / QCL / spatial relation with other PSSCH. PSCCH can be QCLed with SSB / PSSCH / PSFCH. PSSCH can be QCLed with PSSCH or PSFCH. PSFCH can be QCLed with PSCCH or PSFCH.
[0165] By configuring beams, the resource overhead and delay caused by beam sweeping can be reduced. The beam relations mentioned above are configured at the resource granularity. Furthermore, the same reference resource can correspond to different path information, and different path information can provide additional beam information, which allows the extension of beam relations to path-related beams. Path-related beams are configured as reference resources for sending or receiving target resources. So a reference resource can be also a time-frequency and a spatial / path indicator resource.
[0166] Additionally, considering mobility and beam prediction, when configuring beam relations, multiple reference resources can be assigned to the target resource, or multiple target resources can be assigned to one or more reference resources. For example, in the case of measuring the Line-of-Sight (LOS) path, taking into account device mobility, when the LOS path is obstructed and only Non-Line-of-Sight (NLOS) paths are available, the device can use the beam associated with the maximum NLOS path for transmission / reception. This way, the device can obtain higher gains during the transmission / reception of that resource.
[0167] Furthermore, for the same target resource, multiple receiving beams can be configured, each corresponding to a different path. For instance, if the two largest paths based on RSRPP are both NLOS paths, the device can use virtual anchors to obtain relevant channel information. This reduces the resource cost of transmission and avoids synchronization issues when sending two resources.
[0168] Example 11
[0169] Based on the proposed procedures, the beam / QCL / spatial / pathloss relation is introduced between reference signals or channels.
[0170] Case 1: Based on Round-Trip Time (RTT) positioning method: taking SL-PRS transmission as an example: There can be a QCL relation between SL-PRS transmissions.
[0171] In the double side RTT positioning method, when transmitting SL-PRS between A and B and then back from B to A, the two SL-PRS transmissions (A-B and B-A) are QCL related.
[0172] Due to the channel reciprocity, for UE A, the second A-B transmission's beam can be related to the beam used by UE B for the B-A transmission (that is, opposite to the receiving beam's direction) , indicating a QCL relation; for UE B, the B-A transmission's beam can correspond to the A-B transmission's beam, implying a QCL relation between B-A SL-PRS and the second A-B SL-PRS.
[0173] Case 2: based on repetition: the repetition resources of SL-PRS are QCL related. In multiple repetitions, after receiving beam switching information (indicated by 1 bit in SCI) , the beam direction can be modified.
[0174] For Uu interface positioning (sensing) , in FR2 (or unlicensed band) , the repetition resources of PRS have QCL relations.
[0175] Scheme 1: The repetition maintains the same beam / pathloss relation as the initial transmission.
[0176] Scheme 2: Within a 32-slot period of the maximum repetition, the same beam / pathloss relation is maintained.
[0177] Case 3: Periodic SL-PRS. When UE periodically sends SL-PRS, the corresponding beam information can be configured based on the SL-PRS transmission cycle. For shorter cycles, it can be assumed that the UE is moving at a lower speed, and all resources can be set with the same beam information, including both transmit and receive beam information.
[0178] For higher-speed movements, the beam information can be periodically configured within the maximum repetition of 32 slots, based on velocity information and beam sweeping. For example, sequentially using adjacent beams for transmitting SL-PRS during the beam indication.
[0179] For all kinds of sending / receiving signals / channels with QCL relations, there can be also a QCL binding relation between transmit and receive directions. For instance, the beam direction used for receiving S-SSB is the same as the one used for transmitting SL-PRS.
[0180] Additionally, when configuring SL beam / pathloss relations, the effective duration of the configuration can be considered. One approach is to configure it as an infinite duration until a new configuration arrives, which then changes the previous configuration. Another approach is to consider a changing duration limitation, where the beam / pathloss relation is maintained for at least a fixed window. Furthermore, this window length can be bound to speed, data transmission cycle, etc., and a minimum duration for keeping the beam / pathloss relation unchanged can be maintained.
[0181] Example 12
[0182] The beam / pathloss / spatial / QCL relation may have relation with location (s) / angle (s) / phase (s) / information of a RIS (Reconfigurable intelligent surface) . When the RIS is used to assistance a reference resource transmission. For example, the RIS location is transmitted as an association data from LMF to a UE (or gNB) . The RIS location / information can be a measurement of the TRP / gNB / UE. The UE may receive a reference resource. The UE may send a SRS-Pos to TRP based on the RIS information. The UE may send the target resource based RIS information, which can make the TRP receive the target resource better.
[0183] The information of RIS can be at least one of the location (s) / angle (s) / phase (s) / normal direction (s) / tangential direction (s) (list) of RIS (s) . The RIS (s) can be seen as the reflector (s) . The RIS (s) in the example can be also (s) reflector (s) . Based on the reflector (s) / RIS (s) , virtual point (s) / TRP (s) / UE (s) location can be used to assist position / location.
[0184] The RIS / reflector information can be used to locate or assist the beam management. It can reduce the transmission overhead. Alternatively, the RIS / reflector information can be a sub-IE in the beam / pathloss / spatial / QCL relation configuration (s) . Alternatively, the RIS / reflector information can be a path-specific IE (s) / IE (list) .
[0185] It should be understood that one or more features from the above implementation examples are not exclusive to the specific implementation examples, but can be combined in any manner (e.g., in any priority and / or order, concurrently or otherwise) .
[0186] FIG. 15 illustrates a flow diagram of a method 1500 for positioning in frequency range 2 (FR2) . The method 1500 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGs. 1–14. In overview, the method 1500 may be performed by a first wireless communication entity (e.g., a UE) , in some embodiments. Additional, fewer, or different operations may be performed in the method 1500 depending on the embodiment. At least one aspect of the operations is directed to a system, method, apparatus, or a computer-readable medium.
[0187] A first wireless communication entity (e.g., a user equipment (UE) ) may configure (e.g., channel (CH) / reference signal (RS) resource) a second message to be sent or received based on a relation associated with a first message sent or received by the first wireless communication entity. The relation may comprise: an uplink (UL) spatial relation, a downlink (DL) Quasi-Co-Location (QCL) relation, a sidelink (SL) spatial / QCL relation, and a pathloss relation.
[0188] In some embodiments, the relation can be configured per one or more resource sets of the second message, or per one or more resource groups of the second message. In some embodiments, the relation can be indicated by a single bit. The single bit can be indicated per reference Signal or per path of a resource for the reference Signal. In certain embodiments, the relation can be indicated by n bits, n being an integer greater than 1. The n bits may correspond to a path index, a path delay, one or more path angles, one or more path delays, one or more RSRPPs, one or more timestamp (s) , or an Angle of Arrival (AOA) index.
[0189] In some embodiment, the first wireless communication entity may send a third message to the second wireless communication entity. The third message may comprise at least one of: AOAs of different paths, path IDs of different paths, path delays of different paths, or arrival times of different paths. The first wireless communication entity may measure Path-Specific. The first wireless communication entity may send the measurement of Path-Specific to a second wireless communication entity or a core network entity (e.g., a location management function (LMF) ) .
[0190] In some embodiments, path-Specific can be measured by a second wireless communication entity. The measurement of Path-Specific can be configured to be reported to a core network entity (e.g., a location management function (LMF) ) , or configured for the first wireless communication entity. Assistance data concluding the Path-Specific can be configured by the core network entity.
[0191] In some embodiments, the first wireless communication entity may send a third message requesting the assistance data to the core network entity. A second wireless communication entity may request the assistance data. The relation can be associated with one or more valid time gaps. The relation may further comprise a pathloss relation, and the reference resource of pathloss relation. The relation can be associated with one or more ranges. Each of the one or more ranges may include at least one of: expectedRSTD, expectedRSTD-uncertainty, expectedAoD, expectedAoA, or ExpectedAoD-or-AoA. Each of the one or more ranges can be configured per resource, per one or more resource sets, per one or more resource groups, or per one or more Transmission Reception Points (TRPs) .
[0192] In some embodiments, the second message can be a SL-PRS. The first message can be a Physical Sidelink Shared Channel (PSSCH) . The relation may comprise a sidelink (SL) spatial / quasi co location (QCL) relation of a reference resource. The reference resource can be indicated by at least one of: a pool index, a slot index, a sub-channel, a resource block (RB) set, an interlace index, a comb index, a port index, an antenna panel index, or a path indicator.
[0193] While various embodiments of the present solution have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand example features and functions of the present solution. Such persons would understand, however, that the solution is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described illustrative embodiments.
[0194] It is also understood that any reference to an element herein using a designation such as "first, " "second, " and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
[0195] Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0196] A person of ordinary skill in the art would further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software" or a "software module) , or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure.
[0197] Furthermore, a person of ordinary skill in the art would understand that various illustrative logical blocks, modules, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and / or transceivers to communicate with various components within the network or within the device. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
[0198] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
[0199] In this document, the term "module" as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according embodiments of the present solution.
[0200] Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present solution. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present solution. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.
[0201] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.
Claims
1.A wireless communication method, comprising:configuring, by a first wireless communication entity, a second message to be sent or received based on a relation associated with a first message sent or received by the first wireless communication entity.2.The wireless communication method of claim 1, wherein the relation comprises: an uplink (UL) spatial relation, a downlink (DL) Quasi-Co-Location (QCL) relation, a sidelink (SL) spatial / QCL relation, and a pathloss relation.3.The wireless communication method of claim 1, wherein the relation is configured per one or more resource sets of the second message, or per one or more resource groups of the second message.4.The wireless communication method of claim 1, wherein the relation is indicated by a single bit, and wherein the single bit is indicated per referenceSignal or per path of a resource for the referenceSignal.5.The wireless communication method of claim 1, wherein the relation is indicated by n bits, n being an integer greater than 1, and wherein the n bits correspond to a path index, a path delay, one or more path angles, one or more path delays, one or more RSRPPs, one or more timestamp (s) , or an Angle of Arrival (AOA) index.6.The wireless communication method of claim 1, further comprising:sending, by the first wireless communication entity to the second wireless communication entity, a third message;wherein the third message comprises at least one of: AOAs of different paths, path IDs of different paths, path delays of different paths, or arrival times of different paths.7.The wireless communication method of claim 1, further comprising:measuring, by the first wireless communication entity, Path-Specific; andsending, by the first wireless communication entity to a second wireless communication entity or a core network entity, the measurement of Path-Specific.8.The wireless communication method of claim 1, wherein Path-Specific is measured by a second wireless communication entity, and the measurement of Path-Specific is configured to be reported to a core network entity, or configured for the first wireless communication entity.9.The wireless communication method of claim 7 or 8, wherein assistance data concluding the Path-Specific is configured by the core network entity.10.The wireless communication method of claim 9, further comprising:sending, by the first wireless communication entity to the core network entity, a third message requesting the assistance data.11.The wireless communication method of claim 9, wherein a second wireless communication entity requests the assistance data.12.The wireless communication method of claim 1, wherein the relation is associated with one or more valid time gaps.13.The wireless communication method of claim 2, wherein the relation further comprises a pathloss relation, and the reference resource of pathloss relation.14.The wireless communication method of claim 13, wherein the relation is associated with one or more ranges.15.The wireless communication method of claim 14, wherein each of the one or more ranges includes at least one of: expectedRSTD, expectedRSTD-uncertainty, expectedAoD, expectedAoA, or ExpectedAoD-or-AoA.16.The wireless communication method of claim 14, wherein each of the one or more ranges is configured per resource, per one or more resource sets, per one or more resource groups, or per one or more Transmission Reception Points (TRPs) .17.The wireless communication method of claim 1, wherein the second message is a SL-PRS, and the first message is a Physical Sidelink Shared Channel (PSSCH) .18.The wireless communication method of claim 1 or 17, wherein the relation comprises a sidelink (SL) spatial / quasi co location (QCL) relation of a reference resource.19.The wireless communication method of claim 1 or 18, wherein the reference resource is indicated by at least one of: a pool index, a slot index, a sub-channel, a resource block (RB) set, an interlace index, a comb index, a port index, an antenna panel index, or a path indicator.20.A wireless communications apparatus comprising a processor and a memory, wherein the processor is configured to read code from the memory and implement a method recited in any of claims 1 to 19.21.A computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a method recited in any of claims 1 to 19.